islower

測試一個項目中的地區設定是否為小寫。

template<Class CharType>
   bool islower(
      CharType _Ch, 
      const locale& _Loc
   )

參數

• _Ch
  要測試的項目。

• _Loc
  包含項目的地區設定要測試的。

傳回值

true ，如果測試的項目是小寫字元， false ，否則會傳回。

備註

樣板函式傳回 use_facet<ctype<CharType> > (_Loc)。 是(ctype<CharType>::lower， _Ch)。

範例

// locale_islower.cpp
// compile with: /EHsc
#include <locale>
#include <iostream>

using namespace std;

int main( )   
{
   locale loc ( "German_Germany" );
   bool result1 = islower ( 'L', loc );
   bool result2 = islower ( 'n', loc );
   bool result3 = islower ( '3', loc );

   if ( result1 )
      cout << "The character 'L' in the locale is "
           << "a lowercase character." << endl;
   else
      cout << "The character 'L' in the locale is "
           << " not a lowercase character." << endl;

   if ( result2 )
      cout << "The character 'n' in the locale is "
           << "a lowercase character." << endl;
   else
      cout << "The character 'n' in the locale is "
           << " not a lowercase character." << endl;

   if ( result3 )
      cout << "The character '3' in the locale is "
           << "a lowercase character." << endl;
   else
      cout << "The character '3' in the locale is "
           << " not a lowercase character." << endl;
}

Output

The character 'L' in the locale is  not a lowercase character.
The character 'n' in the locale is a lowercase character.
The character '3' in the locale is  not a lowercase character.

需求

標題: <locale>

命名空間: std